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# INSetAudioSourceInCarIntentHandling

The handler interface for changing a vehicle’s audio source.

```
protocol INSetAudioSourceInCarIntentHandling : NSObjectProtocol
```

## Overview

Automotive venders can support the [`INSetAudioSourceInCarIntentHandling`](/documentation/Intents/INSetAudioSourceInCarIntentHandling) protocol in an Intents extension that they ship with their automotive apps. Use the methods of this protocol to resolve, confirm, and handle requests to change the vehicle’s current audio source. Your extension should be able to communicate with the vehicle and make the necessary audio changes.

Siri delivers an [`INSetAudioSourceInCarIntent`](/documentation/Intents/INSetAudioSourceInCarIntent) object to your handler when the user asks to change the audio source. The provided intent object contains information that you use to determine the new audio source and to make the change.

## Topics

### Resolving the Intent Parameters

[`resolveAudioSource(for:with:)`](/documentation/Intents/INSetAudioSourceInCarIntentHandling/resolveAudioSource(for:with:))

Resolves an explicitly selected audio source.

[`resolveRelativeAudioSourceReference(for:with:)`](/documentation/Intents/INSetAudioSourceInCarIntentHandling/resolveRelativeAudioSourceReference(for:with:))

Resolves the audio source using a relative qualifier.

### Confirming the Response

[`confirm(intent:completion:)`](/documentation/Intents/INSetAudioSourceInCarIntentHandling/confirm(intent:completion:))

Confirms whether you can change the audio source.

### Handling the Intent

[`handle(intent:completion:)`](/documentation/Intents/INSetAudioSourceInCarIntentHandling/handle(intent:completion:))

Handles changing the audio source.


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